Sheila Lavery Karen Sullivan, Clare Hill, Diana Vowles, Nance Fyson, Nikki Bradford
Hamlyn, 1996
Buku Teks SO
Evans, Mark
Lorenz Books, 2002
Buku Teks
Bill Gottlieb, Susan G. Berg, Patricia Fisher, Doug Dollemore, Mark Giuliucci, Jennifer Haigh, Sid Kirchheimer, Jean Callahan
Bantam Books, 1997
Buku Teks SO
C. Norman Shealy, Sue Hook
Element Books, 1999
Buku Teks SO
C. Norman Shealy, Sue Hook
Element Books, 1999
Buku Teks SO